im new to shake and compositing so can someone help out with something basic? im learning from the apple pro training book shake 4 by marco paolini if you have the book and on page 212 theres a section on averaging tracks. i follow theses instruction but when im given the instruction to select the curve editor i select it and nothing but flatlines appear. in the book there's diffrent types of squiggly lines. what am i doing wrong?